Patents by Inventor Koichi Kuboichi

Koichi Kuboichi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Actuator
    Patent number: 4423642
    Abstract: An actuator has a driving piston disposed in a cylinder tube and is interlockable with a driving stem, the driving piston being normally biased resiliently downwardly, but when the driving piston is forced upwardly, it is retained against the resilient force of a retaining device. When the driving piston is forced downwardly, the retaining device is released from its retaining action, allowing the piston to descend rapidly by virtue of the resilient force, the driving piston being connected to a valve body of a valve assembly or the like.
    Type: Grant
    Filed: March 2, 1981
    Date of Patent: January 3, 1984
    Assignee: Eagle Industry Co., Ltd.
    Inventor: Koichi Kuboichi